def test_degree_in_key(self):
"""
Ensure that it plays in G major.
"""
from sebastian.core.transforms import degree_in_key
from sebastian.core.notes import Key, major_scale
h1 = self.make_horizontal_sequence()
keyed = h1 | degree_in_key(Key("G", major_scale))
self.assertEqual(keyed._elements, [
{
'degree': 1,
'pitch': -1
},
{
'degree': 2,
'pitch': 1
},
{
'degree': 3,
'pitch': 3
},
{
'degree': 1,
'pitch': -1
},
])
def test_degree_in_key_with_octave(self):
"""
Ensure that degree in key with octave is sane
"""
from sebastian.core.transforms import degree_in_key_with_octave
from sebastian.core.notes import Key, major_scale
h1 = self.make_horizontal_sequence()
keyed = h1 | degree_in_key_with_octave(Key("C", major_scale), 4)
self.assertEqual(keyed._elements, [{
'degree': 1,
'octave': 4,
'pitch': -2
}, {
'degree': 2,
'octave': 4,
'pitch': 0
}, {
'degree': 3,
'octave': 4,
'pitch': 2
}, {
'degree': 1,
'octave': 4,
'pitch': -2
}])
def build_movement():
# Define our alberti bass signature.
alberti = arpeggio([0, 2, 1, 2])
# Create the basic interval pattern.
intervals = HSeq({DEGREE: x} for x in [1, 5, 1, 4, 1, 5, 1])
# Create the rhythm
rhythm = HSeq({DURATION_64: x} for x in [128, 64, 64, 64, 64, 64, 64])
# Set specific chords to be used in certain measures.
intervals[1]["chord"] = (-3, -1, 0, 2) # second inversion 7th
intervals[3]["chord"] = (-3, 0, 2) # second inversion
intervals[5]["chord"] = (-5, -3, 0) # first inversion
# Combine the sequences, make them chords, produce alberti on the chords,
# fill with each being 8, expand it to a flat sequence.
melody = intervals & rhythm | chord() | alberti | fill(8) | expand
# Define our key
C_major = Key("C", major_scale)
#key(major_scale(-2))
# Set the degree, add the midi pitch, make it an OSequence, add debugging information.
return melody | degree_in_key_with_octave(C_major, 5) | midi_pitch() | OSequence | debug
def test_play_notes_in_midi_pitches(self):
"""
Ensure that it plays in G major.
"""
from sebastian.core.transforms import degree_in_key, midi_pitch, add
from sebastian.core.notes import Key, major_scale
from sebastian.core import MIDI_PITCH, DURATION_64
h1 = self.make_horizontal_sequence()
keyed = h1 | degree_in_key(Key("G", major_scale))
positioned = keyed | add({'octave': 4, DURATION_64: 8})
pitched = positioned | midi_pitch()
self.assertEqual(pitched._elements, [
{
'degree': 1,
'pitch': -1,
DURATION_64: 8,
MIDI_PITCH: 55,
'octave': 4
},
{
'degree': 2,
'pitch': 1,
DURATION_64: 8,
MIDI_PITCH: 57,
'octave': 4
},
{
'degree': 3,
'pitch': 3,
DURATION_64: 8,
MIDI_PITCH: 59,
'octave': 4
},
{
'degree': 1,
'pitch': -1,
DURATION_64: 8,
MIDI_PITCH: 55,
'octave': 4
},
])
def end(scale):
return HSeq(scale[i] for i in [2, 1]) | add(quaver_point)
def h2(scale):
return HSeq(scale[i] for i in [0, 4, 3, 4]) | add(quaver_point)
def h2_end1(scale):
return HSeq(scale[i] for i in [0, 4]) | add(quaver_point)
# there's two important quarter notes used at the ends of sections
e1 = HSeq(scale[3]) | add(quarter_point)
e2 = HSeq(scale[0]) | add(quarter_point)
partA = h1(scale) + h1_end1(scale) + e1 + h1(scale) + end(scale) + e2
partB = h2(scale) + h2_end1(scale) + e1 + h2(scale) + end(scale) + e2
# here we see the basic structure of the song
oseq = OSequence((partA * 2) + (partB * 2))
C_major = Key("C", major_scale)
# note values filled-out for C major in octave 5 then MIDI pitches calculated
seq = oseq | degree_in_key_with_octave(C_major, 5) | midi_pitch()
# write to file:
write_midi.write("shortning_bread_1.mid", [seq])
seq4 = seq3 | transpose(12) | reverse()
# merge
seq5 = seq3 // seq4
# play MIDI
player.play([seq5])
# write to MIDI
write_midi.write("seq5.mid", [seq5])
# contruct a horizontal sequence of scale degrees
seq6 = HSeq(Point(degree=degree) for degree in [1, 2, 3, 2, 1])
# put that sequence into C major, octave 4 quavers
C_MAJOR = Key("C", major_scale)
seq7 = seq6 | add({"octave": 4, DURATION_64: 8}) | degree_in_key(C_MAJOR)
# convert to MIDI pitch and play
player.play([OSequence(seq7 | midi_pitch())])
# sequence of first four degree of a scale
seq8 = HSeq(Point(degree=n) for n in [1, 2, 3, 4])
# add duration and octave
seq8 = seq8 | add({DURATION_64: 16, "octave": 5})
# put into C major
seq8 = seq8 | degree_in_key(C_MAJOR)
# annotate with lilypond
"""
The main title theme to HBO's Game of Thrones by Ramin Djawadi
"""
from sebastian.core import Point, HSeq, OSequence
from sebastian.core.transforms import midi_pitch, degree_in_key, add
from sebastian.core.notes import Key, major_scale, minor_scale
from sebastian.midi import write_midi
C_Major = Key("C", major_scale)
C_minor = Key("C", minor_scale)
motive_degrees = HSeq(Point(degree=n) for n in [5, 1, 3, 4])
motive_rhythm_1 = HSeq(Point(duration_64=n) for n in [16, 16, 8, 8])
motive_rhythm_2 = HSeq(
Point(duration_64=n) for n in [48, 48, 8, 8, 32, 32, 8, 8])
motive_1 = motive_degrees & motive_rhythm_1
motive_2 = (motive_degrees * 2) & motive_rhythm_2
# add key and octave
seq1 = (motive_1 * 4) | add({"octave": 5}) | degree_in_key(C_minor)
seq2 = (motive_1 * 4) | add({"octave": 5}) | degree_in_key(C_Major)
seq3 = motive_2 | add({"octave": 4}) | degree_in_key(C_minor)
seq = (seq1 + seq2 + seq3) | midi_pitch() | OSequence
write_midi.write("game_of_thrones.mid", [seq], instruments=[49], tempo=350000)
down_degrees = [6, 4, 3, 2, 1, 2, 3, 4]
final_degree = [1]
sections = [
(up_degrees, 4, range(14)),
(down_degrees, 4, range(13, -2, -1)),
(final_degree, 32, range(1)),
]
hanon_1 = OSequence()
for section in sections:
pattern, duration_64, offset = section
for o in offset:
for note in pattern:
hanon_1.append({"degree": note + o, DURATION_64: duration_64})
hanon_1 = hanon_1 | degree_in_key_with_octave(Key("C", major_scale),
4) | midi_pitch()
hanon_rh_1 = hanon_1
hanon_lh_1 = hanon_1 | transpose(-12)
seq = hanon_lh_1 // hanon_rh_1
if __name__ == "__main__":
f = open("hanon.mid", "w")
s = SMF([seq])
s.write(f)
f.close()